Change-speed mechanism



Nov. 27, 1928. *1,693,139y

O. A. DIETSCHE CHANGE SPEED MECHANI SM Filed Jal l2, 1927 3 Sheets-Sheet2.

Nov. 27, 1928.

o. A. D'IETscHE CHNGE SPEED MECHANlSM 3 Shets-Sheet Filed Jan. l2, 192?/ff v lsb zzf 77 ,f5/ E ///////////////f///////l//// atv] [l s mar' A.Dietrihe JMW Patented Nov. 27, 1928.

UNITED STATES OSCAR A. DIETSCHE, OF LOS ANGELES, CALIFORNIA.

cHANGnsPEED MECHANISM.

Application filed LTanuary 12, 1927. Serial No. 160,683.

This invention relates to improvements in transnr n mechanisms.

The primary object of this invention is the provision ofan improvedtransmission mechanism, of the planetary tyge. embodying means tosubftantially eliminate gear shifting', and enab quick get-away from astanding start, without gear shifting operations. further object of thisinvention is the lo provision of an improved transmission mechanismincludingl a selective manually operated gear shift, or a clutchoperated gear shift.

A further object of this invention ,is the l5 provision of an improvedchange speed mechiism which embodies means to drive a driven shaft atlow, intermediate and high speeds, 'i h a smooth flow of power. whicheliminates `the necessity of thiottlingI down the engine when cl .igingspeed, and thereby enables a euicl get-away, which is vitally essentialunder conditions of driving in tratlic in large CllGS. Y

Other objects and advantages of this invent zou will be apparent duringthe course of the tollowing detailed description.

ln the accompanying drawings, forming a part of this specitication, andwherein similar reference characters designate correspending partsthroughout the several views,

Figure 1 is a substantially vertical sectional view talienlongitudinally of the change speed mechanism, showing cooperatingdetails of the gear mechanism, in low gear.

Figure Q is substantially a plan view, partly i section, of detailsillustrated in Figure 1.

Figure 3 is a representation of two operat y ing Veleincnts of theimproved change speed mechanisigi, showing relative operative positionsof the same, in dot and dash lines with respect to other details to besubsequently described.

Figures 4 and 5 are sectional views taken substantially on theirrespective lines. in Figure 1 of the drawings.

Figure 6 is a fragmentary sectional view of details*illustrated inFigure 1, showing th', ar mechanism in high gear.

F g ire T is a fragmentary sectional view detent mechanism showingvarious details of the mechanism, the view being taken substantially onthe line 7 7 of Figure 5.

Figure 8 is a fragmentary sectional view of details of the gearmechanism, in reverse drive position.

Figure 9 is a sectional view taken substan. tially on the line 9 9 ofFigure 8. i

Figure 10 is a view of the operating mechanism of the invention, inneutral position.

Figure 11 is a sectional view taken thru the operating mechanism,showingr more particularly control means.

Figure 12 is a sectional View showing a 1rride plate for receivingdetails of the operating mechanism for a purpose to be subsequentlydescribed. i

Figure 13 is a view of clutch detent details.

In the drawings, wherein for the purpose of illustration is shown only apreferred embodiment of the invention, the `letter A may generallydesignate the improved gear transn'iissic-n mechanism, which maycomprise a. housing B; wherein is rotatably mounted drive and drivenshafts C and D respectively. Speed reducing devices E and F are providedas part of the speed mechanism, in cooperating relation wth respect tothe drive and driven shafts C and D; operating mechanism G beingprovided for cooperation with the speed reducing devices E and F. MeansH may be provided for cooperation with the means G to automaticallyoperate the change speed mechanism by clutch operation of the vehicle.

The housing B lis of any approved construction7 including side walls 15and 16, and end walls 18 and 19, and any approved removable coverconstruction 20.

The drive shaft C is the motor connected shaft, beingl rotatablylnounted in suitable `bearings 22 in the end wall 19 of the transmissionmechanism B, and having a large hol-V low cylindrical portion 23,preferably integral therewith, located within the housing compartment24, which has a socket 25 therein opening in the housing compartment 24.Adjacent itsV open socket end, externally thereon, the said portion 23is provided with ah annular gear or'series of teeth 26, forcooperationwith the speed reducing mechanism Fi to be subsequently described.

rllhe driven shaft D extends longitudinally .thru the housingcompartment 24, bearing at one end in a suitable bearing 31 provided inthe end wall 18; the shaft Drimmedia'tely in side of the compartment 24,adjacent the end wall 18, having an enlarged portion 3.2, integral orrigid therewith, and includmg a cylindrical end portion 34 also integraltherewith, so that the free end thereof rotatably the gear reductionVdevices E and F respectively. The devices 89 and 90 are of a formationsubstantially illustrated in Figure of the drawings, each of the samebeing a substantially half-circle segment., pivoted at 91 in the sidewalls and 16 of the housing, to provide lower fingers 92 projecting foroper ation on the gear facing sides of the discs and 51; said segments89'and 90, between the ends thereof, having theconnecting rods 87 and 88pivotally connected as at 93. Upon rocking of the lever 81 the clutchfork 89 is operated to move the disc 35 for compression of the springand releasing the clutching action on the gears of the reduction devicesE, to permit rotation thereof on their respective pivot pins 36, andsimilarly upon operation of the lever device 82, thru the connecting rod88 the fork 90 will be operated to similarly reduce the clutching actionof the disc 51 of the gear reduction device F, by compressing thesprings 64 and releasing the gears 55 and 56 to permit free rotationthereof on their respective pins 54. Spiral springs 96 are provided onthe shaft 80, one for each lever 81 and 82, to urge the arms 85forwardly.

As will be noted from Figure 2 of the draw ings, the lever arm 84 of thelever device 82 is provided with a cross arm 98 which extends across thearm portion 84 of the lever device 81, so that upon rocking of the leverdevice 82, against tension of its spring 96, the cross piece 98 willmove the lever device 81 also, so that whenever the lever device 82 ismoved against tension of the spring 96, the operation of this singlelever device will also operate the lever devices 81 and therewith willoperate both forks 89 and 90 to throw out the clutch devices of the gearreduction mechanisms E and F. This is not true of the lever device 81,which functions independently against tension of the spring 96, withoutoperating the lever device 82, and for a purpose which will besubsequently described. Y

Detent devices are provided for each of the discs 35 and 51, each ofwhich', as illustrated in Figures 5 and 13, consists of a pair of pawls100 and 101 respectively pivoted on pins 102 and 103; the free ends ofthe pawls 101 at 104 resting on the free ends 105 of the pawls 100, inorder to insure a synchronous operation of the pawls of each detentdevice. The pins 102 and 103 are suitably carried by brackets 106 at Ythe inner sides of the housing walls 15 andr 16,

and each of said pawls includes a pawl projection 108 adapted tocooperate on the teeth at the outer periphery on both the discs 35 and51. Springs 110 are provided on the pins 102 and 103, as is wellillustrated in Figure 7 of the drawings, in order Vto force the pawls ordetent members 100 and 101 into a detent engagement with the teeth 109as illustrated in Figure 5. Vhile the spring arrangement for the pin 102has been illustrated inV Figure 7. it is also understood that a similarspring ar# rangement is provided for the pin 103 for the detents 101thereon, after the manner illustrated in Figure 13 of the drawings.

Referring to the operating mechanism Gr7 spaced brackets and 116 aresupported in the compartment 24, being secured at 117 on the inner sideof the wall 18, and extending diagonally upward in spaced relation, andatV their free ends horizontally pivotally supporting a handle securingshaft 118; the same having pin projections 119 at the ends thereofbearing in the arms 115 and 16. Rigid with t-he shaft 118 are dependingspaced operating fingers 120 and 121. Thev operating fingers 120 and 121are formed as individually shown in Figure 3 of the drawings, and areadapted for respective cooperation on the arm portions 84 of the leverdevices 81 and 82, as will be subsequently described.

A control rod is longitudinally slidable above the drive and drivenshafts; being re.- ciproc-ably supported in suitable bearings 126 in theend walls 18 and 19, as illustrated in various views of the drawings,and upon this rod 125, is a fork connection 130, operating loosely in agroove 132 in the gear connecting member 70, to enable a longitudinalshift of the latter, to effect various gear meshing operations.YSuitable links 133 are. pivotally connected at their forward ends uponthe fork member 130, and at their opposite ends at the inner sides ofthe operating arms 120 and 121, so that upon movement of the. saidoperating arms, thru the links 133, the rod 125 may be movedlongitudinally for causing the member 70 to shift longitudinally of thedriven shaft, to effect various gear meshing operations, as will besubsequently mentioned.

Referring to a description of the invention, for low speed operat-ion ofthe driven shaft D, the handle is brought forward. It is to be notedthat the handle 140 has an integral or rigid head portion 141, havingdownwardly converging sides resting in a socket- 142 in the top of theshaft 118, handle 140 below the portion 141 having a sha-nk 143cooperating in a guide groove 144 of a guide platel 145, in a relationto Vbe subsequently mentioned. As above mentioned, for low speed thehandle portion is pushed forwardly, towards the motor end of thetransmission mechanism, and this of course moves the. operating fingers120 and 121 rearwardly. These fingers 120 and 121 upon the lower forwardends thereof are provided with cam projections 14T and 148 respectively,which operate on the rollers 149 at the free ends of the levers 84 ofthe lever devices 81 and 82 respectively, rocking the llfl lever devices81 and 82 so that the arms 84 i' move downwardly to pull the armportions 85 rearwardly, to the position illustrated in Figure 1, andthru the connecting links 87 andA 88 the clutch operating members 89 and90 are rocked to push the discs 35 and 51 forwardly and release theclutching operation upon t-he Vlever handle 14() is moved rearwardly;S0' Sli their respective pins 36 and 54, and at the same time the pawllevers 100 of the respective detent devices for the discs 35 and 51 dropinto notches 152 and 153 respectively provided therefor in the rod 125,permitting said pawl arms 100 to drop, so that the projections 108 yengage the teeth of -the discs 35 and 51, to.

prevent rotation of said discs in one direction. Due to thejfree ends ofthe pawlslOl resting on the pawls 100the former will also drop so thatthe proj'ectionslOS thereof engage the teeth of the discs 35 and 51 topreventrotationvin an oppositeY direction, as can readily be understoodfrom Figure 5 of the drawings, so that while the clutch operation on ther' duction gears is released, the clutch discs 35 and 51 are heldagainst rotation, so that the gears 38, 39, 55 and 56 may rotate onliXed a-Xes with respect to the d'ive and driven shaft-s. In thisrelation of parts the low speed drive of the driven shaft D is firstthru the drive shaft C, then thru the reduction gears 38. and 39 thruthe gear 26; then to the sleeve 41 by meshing of the gear 40 t-hereof onthe gearsy 39; then to the reduction gears 55 and 56 by` meshing of thegearV 50a of the sleeve 41 with the gears 55; then to the sleeve 60 bymeshing of the gear portion 58 thereof with the reduction gears 56. Inthis low speed position the lever 140 has been moved so that the forli130 will hold the gear connecting member 70 splined on and keyed to theshaft portion 32, and in this position the spline tooth T3 is alsosplined on'thegear teeth 65, so that the sleeve 60 is efiectuallyconnected by the member to the driven shaft D, and incident to the driveof the driven shaft thru the train of reduction gears as yabovementioned, with the clutches of the Vdevices E and F out, a low speeddrive of the driven shaft D will be effected. i

In order to go into intermediate or second speed, it is merely necessaryto move Vthe lever 146 rearwardly, and it is to be Vnoted that means isprovided to gauge the distance to move, in the provision of a springurged detent 169, illustrated in Figures 6 and 8 of the drawings,whichengages in a notch 161 for low speed; a notch 162 for intermediatespeed; and a notch 163 for high speed. The

lnotch ,164 is provided for neutral; and 'as' illustrated in Figure 8 ofthe drawings the roller ofthe springurged detent 160 is in a notch165designating reverse speed position ofthe rod 125., For intermediatespeed,rthe

that the detent disengages from the .notch 161 and engages 'in the notch162. During this movement the operating fingers-12() and 121 will bemoved so thatithe finger 148 of the cam 121 will release the roller 149of the lever member 82, permitting the roller 149 to ride upwardly intothev recess 160:L in the lower marginal portion of thelever 121, andthis enables the spring 96lofthe lever 82 to move the lever 82 and pushthe linlr 88 for-V wardly to engage the fork member with the clutch disc5l and permit theisprings 64 to push the disc 51 into frictional engagement with the gears 55, so that the gears 56 are moved along to engagethe disc 53, and thus the gears 55 and 56 are held between the discs 35and 51 in clutched relation therewith, so that they cannot rotate upontheir respective pinsv T4, but must rotate bodily about the shaft D. Atthe same time as the handle 140 is so shifted, the rod l25`is moved thatthe pawl 100 thereof rides out of notch 153 and this elevates the pawl190 and also the pawl 101 of the respective reducing mechanism F,permitting the disc 51 to rotate free of the pawl mechanism. The driveof the shaft D for second speed is then thru the driven shaft C; thruthe reducing mechanism E as above described for low speed, andiit is tobe noted that the gears 38 and 39 of the mechanism E are free to rotateon their respective pins 36; free of clutchingl relation with the discs35 and 45. The drive is then thru the sleeve 41, and the entire reducingmechanism F is then rotated about the drive shaft incident to the factthat the 55 and 56 are locked between the discs 51 and 54, so that thespeedlreduction is ineffective and the drive is direct from the sleeve41, to the sleeve 60, thru the intermediary, of the now locked speedreduction device F, which drive is then tra emitted to the driven shaftD thru the gear connecting member 70 splined on the teeth 65 and shaftportion 32, as rabove described.

For high speed, the lever 149 is shifted rearwardly vanother notchuntilv the detent 160 engages in the notch 163, and in this position,illustrated in Figure 6 of the draw ings, the operating fingers 120 and121 have both moved so that the respective cam portions 147 and 148 arefree of operation on the p rollers of the arms v84 f of the lever.devices' 81 and 82, 'permitting the springs 96 to throw theforks 89 and90 to permit the clutching of the devices E and F to engage andgreventing rotation lof 'the speed reduction gears of said devices onthe respective pins 36 and 54, so that the drivefor high speed is su theshafty C, to the sleeve 41V thru the'intermediary ofthe speedreductionde'vice F, which now bodily rotates with the shaft@ without anyspeed reduction, and thespeed is the transmitted to the sleeve 66 thruthe intermediary of the now clutched leclred speed reduction mechanismF, .without any speed reduction, and the driving tranr-imitted fromthe'sleeve 60 to the driven shaft D thru the splined gear connectingnier-dier TO which has not as yet splined off of the teeth 65. Duringlthis high speedposition it 'is iik to be noted that the rod 25 has beenmoved so that the pawl members 100 of both the speed reduction devices Eand F have moved out of their respective notches 152 and 153, bodilylifting the detent means from the discs 35 and 51, so that the latterare free to rotate.

Upon further rearward movement of the handle 140, the detent 160 willmove into the notch 164, and in this position the spline tooth 73 of thegear connecting member 70 has now moved off of the teeth 65 intothespace 66 about the sleeve 60, so that the sleeve 60 has no gearedconnection with the driven shaft D; and consequent-ly a4 neutralposition is effected.

For reverse drive of the driven shaft D, it is necessary to nowlaterally shift the handle 140. This is occasioned for the reason thatheretofore during the three forward speeds and neutral position, theshank 143 of the handle has been operating in the slot portion 175 ofthe guide groove 144, as seen in Figure l2, until at neutral positionthe shank 143 lies against the edge 176 in the guide groove, and thus itis necessary to laterally shift the handle 140, to move the shank 143along the lateral portion 177 of the guide groove 144, and then uponcontinued rearward movement of vthe handle 140 to the positionillustrated in Figure 8, the shank 143 is moved along the portion 179 ofthe guide slot 144. It is necessary to provide the offset 177 in theguide groove, for the reason that the operator may quickly go thru thevarious high speeds into neutral without liability of over-reaching intoreverse. For this reverse position it is to be noted that the operatinglingers 120 and 121 are moved forwardly, as illustrated in Figure 8, sothat cam projections 180 and 181 thereon, which are preferably'equal indegree, ride over the rollers of the respective lever devices 81 and 82,to depress the saine and throw the clutches of the devices E and F outof clutching operation on the reduction gears 38, 39, 55 and 56, topermit said reduction gears to freely rotate on their respective pivotpins 36 and 54. At the same time it is to be noted, from Figure 8, thatthe pawl members 100 of the devices E and F respectively drop into slots153 and 180, of the rod 125, which rod of course has been moved incidentto its link connection 133, and the dropping of the pawls 100 permitsthe same to engage as above described upon the teeth of the clutchmembers 35 andv 51, to hold the latter locked and insure a rotation ofthe reduction gears on their pivot pins, without liability of bodilyrotation of the reduction gears about the driven shaft. The reverseposition is illustrated in Figure 8 of the drawings, and in thisposition the gear connecting member has been moved from a neutralposition, until the ring gear 7 7 therein meshes on the teeth of thesmall reduction gears 56 of the gear reduction device F, and. it is tobe noted that the gear reduction member 70 is notnow splined directly onthe sleeve 60, but is still splined on the shaft portion 32 of the driveshaft D. The operation is thence from thc drive shaft C, and into thefreely rotatable reduction gears 38 and 39 incident to coniicction withthe gear 26, and the sleeve 41 is rotated incident to mesh with thegears 39, and the reduction gears 55 and 56 are freely rotated ontheir-respective pins due to meshing relation with the gear 5()a of thesleeve 41, and incident to the meshing of the small reduction gears 56with the internal gear 77 of the gear connecting member 70, the latteris rotated, and incident to its splined connection with the pivot shaftD, the latter is rotated reversely,at slow speed, since of course theconnection of the internal gear 77 upon the small reduction gears 56effects such reverse drive. It is to be noted that the reduction gear iseffective to permit slow speed durl ing the reverse drive as mentioned..

The above is a description of the manual operation of the change speedgearing, and it is to be noted that the saine is planetary in scope.However, means is provided to effect an automatic gear shiftingoperation comprising means associated with conventional clutch mechanismof a vehicle to enable the vehicle to start from a standin position, atslow speed, and to progress into liigh speed, incident to clutchoperation, with a smooth flow of powei', characterized by the absence ofjerks and shocks, now incident to drivingof conventional automotivevehicles.

This means includes a reciprocating rod member 190 supported at one endin the wall 19 of the transmission housing, and extending into thetransmission casing, and therein being slidably mounted in a lug 191, asis illustrated in Figure 2 of the drawings. This rod is provided with arecess 193 therein, facing upwardly, having a sloping cam edge 194 fromthe top edge 196a of the rod 125 to thev bottom of the recess 193. Thelevel' 82 above described is provided with a lever arm 196, as

illustrated in Figure 2 of the drawings, having a roller on the endthereof, adapted to travel along the rod 190; the action of the spring96 above described being to force the arm 196 against the top edge ofthe rod 190.

The slide rod 190 is provided with an adjustable connection 197 thereon,at the outer end thereof, to which a clutch connecting link 198 ispivoted.

As to automatic operation of the change speed mechanism, the handlelever 140 may always be positionedfor high speed, as illustrated inFigure 6, and Vin this position when the car is standing still, thevehicle clutch will of course be thrown out when the engine is inoperation. The engine may be speeded up to any speed desirable, and keptat such speed,

and when the operator releases the control-Y this moves the rod 190farther into the transmission housing, While the roller of the arm 196of lever 82 is still riding alongV the top edge of the rod 190, justbefore it has reached the inclined surface 194, and of course when'theclutch is engaged, it is to be noted that a driven shaft D thru thelow speed cycle aboveV described, notwithstanding the handle 140 issetpfor high speed position, since the controlling elenient in thisinstance is the riding of the roller of arm 196 on the top edge 1961L ofthe slide rod 190. lt is to be noted that there'is always some play inthe clutch pedal after the clutch is fully engaged, and before theoperator has fully released his foot from the pedal, the rod 190 isstill moving into Vthe transmission casing, and the roller of the arm196 rides downwardly over the inclined face 194i1 of the slide 190, andas the same does se the lever 82 Will be released, and the levei` 81.

also, as the cross arm 98 rises, bearing in mind that the handle 140 isset for a high speed position, and as the levers 81 and 82 pivot, theclutch disengagement of the speed reducing devices E and F slowlyreleases to permit a full engagement of said clutch devices of the speedreducing mechanisms E and li when the roller of the arm 196 is fully inthe bottom of the recess 193. This is accomplished during a ride of theroller of the arm 196 along the inclined surface 194 of the slide rod190, and it is to be noted that during this operation the paivl orVdetent devices of the speed reducing mechanisms or devicesE and F arefully out of engagement, and bodily rotation of said Adevices during'low Vand intermediate speed is prevented by the frictional engagementof the forks 89 and 90. rlhus it can be seen that during the vehicleclutch shifting operation the transmission mechanism is moved thru thecycle of lovv, intermediate into high gear, Without a manual handleoperation, which will result in an even distribu-v V tion of the effort,obviating jerking such ras characterizes the operation of the ordinaryspeed mechanism.

Various changes inthe shape, size, and arrangement of parts maybe madeto the form of invention herein shown and described, Without departingfrom the spirit of the same or the scope of the claims.

I claim: 1. In a change speed mechanism the combination of a driveshaft, a driven shaft., a sleeve rotatable on the driven shaft,reductionV gears geared with the drive shaft and sleeve for drive of thelatter at a reduced l detent means for releasably holding the speedratio, means for clutching the gears in a locked relation with thesleeve and drive shaft for bodily rotation therewith, va second sleeverotatable on the driven shaft, reduction gears in a geared relation withsaid sleeves, for drive of the second mentioned sleeve at a reducedspeed ratio, means for locking the second mentioned reduction speedgears with the tivo sleeves for drive of the same at the same rate ofspeed, meansforheying the second sleeve With the driven shaft includinga shiftable member, and means for shifting the member to key ordisconnect the second menioned sleeve with respect to the driven shaft.2. 1n change speed mechanism a drive member, a driven member, a discrotatable and slidable on the drive member, a disc rotatable on thedriven member, pins carried substantially parallel With but eccentric ofthe drive and driven members, reduction gears rotatable on said pinsbetiveen the discs, spring means on the pins urging the discs intoclutching relation with the reduction gears, each gear including a largegear geared With the drive member and a smaller gear geared with thedriven member, and means to move the first mentioned disc to release theclutching eilect of the discs upon said reduction gears.

In change speed mechanism a. drive` into clutching relation With thereduction gears, each gear including a large gear Q earedV with thedrive member and a smaller gear geared with the driven member, means tomove the first mentioned disc to release the clutching eect of the discsupon said reduction gears, and detent means for releasably holding thefirst mentioned disc against rotation.

l. ln change speed mechanism a drive member, a driven member, a discrotatao and slidable on the drive member, a disc retatableon the drivenmember, pins carried substantially Vparallel with butl eccentric of thedrive and driven members, reduction gears rotatable on said pinsbetweenpthe discs, spring means on the pins urging the discs intoclntching relation with the reduction gears,-

eacn gear including a large geared with the drive member and a smallergear geared with vthe driven member, means Vto move the first mentioneddisc to release the clutching effect of the discs upon said reductiongea mentioned disc against rotation, aV second driven member, and meansfor releasably keying the second driven member with the firstmentioneddriven member.

5. 1n change speed mechanism a drivev isc and slidable on the drivemember, a disc rotatable on the driven member, pins carried`Asubstantially parallel with but eccentric of n: the drive and drivenmembers, reduction gears rotatable on said pins between the discs,spring means on the pins'urging theV discs into clutching relation withthe reduction gears, each gear including a large gear geared with thedrive member and a smaller gear geared with theV driven member, means tomove the first mentioned disc to release the clutcl'iingl effect of thediscs upon said reduction gears, detent means for releasably holding thefirst mentioned disc against rotation, a second driven member, means forreleasably keyingl the second driven member with the lirst mentioneddriven member fordrive in the same direction as the drive member. andmeans associated with said last mentioned means and with the firstmentioned driven member for driving the second mentioned driven memberin a reverse direction to the drive of the drive member.

6. In a transmission mechanism a housing, a vdrive shaft, a drivenshaft, a plurality of speed reducing mechanisms for connectingthe driveand driven shafts, including clutch means to connect the drive anddriven shafts for direct drive of the latter, means to maintain saidplurality of speed reducing mechanisms inoperative for direct drive ofthe driven shaft with the 'drive shaft, means associated with the drivenshaft and one of said speed reducingl mechanisms for effectingr areduced speed reverse drive of the driven shaft thru the drive shaft,means for manually operating the last mentioned means and the reductionspeed mechanisms for effecting various forward and reverse drives, andmeans for automatically shifting the speed drive of the driven shaftfrom the drive shaft thru the various forward speeds.

7. In transmission mechanism the combination of a housing, drive anddriven shafts rotatably supported by the housing, a plurality ofreduction gears intermediate the drive and driven shafts in gearedrelation therewith, clutch means normally acting to lock said gears forbodily rotating the drive and driven shafts, an operating rod, meansconnecting the last mentioned means with said operating rod toselectively release the clutch means of said reduction gears, detentmeans to hold said gearing against bodily rotation .with the drive anddriven shafts, and a ro'd movable with said operating member, said rodbeing formed to throw the detent means into locking relation with thespeed reduction gearing when the clutch thereof is released.

8. In transmission mechanism the combination of a housing, drive anddriven shafts rotatably supported by the housing, a plurality ofreduction gears intermediate the drive and driven shafts in 'gearedrelation therewith, clutch means normally acting to lock said gears forbodily rotating thedrive and driven shafts, an operating rod, meansconnecting the last mentioned means with said operating rod toselectively release the clutch means of said reduction geals, detentmeans to hold said gearing against bodily rotation with the drire anddriven shafts, a rod movable with said operating member, said rod beingformed to throw the detent means into locking relation with the speedreductiongearing when the clutch thereof is released, and means forautomatically operating the clutch releasing means independent of saidoperating member.

9. In change speed mechanism a drive shaft, a driven shaft, a frame forrotatably supporting the drive and drivenv shafts, re-

duction gearing, a clutch device `having aA rotatable reduction gearthereon eccentric with the drive and driven shafts and geared with thedrive and driven shafts for reduced speed drive of the driven shaft fromthe drive shaft, means normally clutching the reduction gears to makethe same bodily rotated with the drive and driven shafts to prevent areduced speed drive of the driven shaft, an operating member formovement to release said clutch effort on said reduction gears, a shaft,a substantially bell crank lever oscillatively mounted on the shaft, alink connecting said operating member With said bell crank lever, andmeans for operating upon said bell crank lever.

10. In change speed mechanism the combination of a frame, a drive shaftrotatably carried by said frame having a gear keyed thereon, a drivenshaft rotatably supported by said frame, a sleeve rotatably supported onthe driven shaft having a gear thereon, a member rotatable about theaxis of the driven shaft having pins eccentric thereon with re spect tothe driven shaft, reduction gearing rotatable on said pins includinggears of different size in geared relation with the gears of the driveshaft and sleeve, means to lock loo said gears against rotation so thatthey must bodily rotate with the drive shaft and Sleeve, means torelease said last mentioned means to permit free rotation of saidreduction gears on their respective pins, an operating rod on the frame,a detent, and means for operating the rod to move the detent into or outof retaining relation with respect to said merpber rotatable about theaxis of the driven sha t.

1l. In a transmission a drive shaft, a driven shaft, means rotatablysupporting the drive and driven shafts in independently rotatablerelation, a sleeve rotatable on the driven shaft, a second sleeverotatably mounted on the driven shaft, a member slidably splined on thedriven shaft and with the second sleeve, the splined connection of thesaid last mentioned member with the second sleeve bei-ng such'as topermit ythe same to be diswith the v drive .shaft and first mentionedsleeve, speed reduction means geared ,With the first 'and secondmentioned sleeves, and

`means to independently and selectively 0perate the speed reductionmeans With the respective members with which they are geared 'forvbodily rotation about thev axes of the drive Aand driven shafts in anon-speed reducing drive. v

12. In a transmission, a drive shaft, a driven shaft, means rotatablysupporting the drive and driven shafts in independently rotatablerelation7 a sleeve rotatable on the driven shaft, a .second sleeverotatably mounted on the driven shaft, a member slidably splined on thedriven shaft and with the second sleeve, the splined connection of thesaid last mentioned member with the second sleeve beingl such as topermit the same-,to be disconnected vvhen the splined connection of saidmember iv-ithzthe driven shaft is not disconnected, speed reductionmeans geared with the drive shaft and first mentioned sleeve, speedreduction means geared with the first and second mentioned sleeves,means to independently and selectively operatethe speed redncti on meanswith the respective members with Vwhich they are geared for bodilyrotation about the axes of the drive and driven shafts, in non-speedreducing drive, said member splin-ed on the driven shaft having a gearthereon for intermeshing with the gear reductien means of said secondsleeve with the said member ont of splined connection with the secondsleeve and in a splined connection Vwith the driven shaft for drive ofthe. latter in a reverse speed.

oscene. nmrscnn.

